A lockout padlock is not optional equipment on a construction site where workers service or maintain equipment. It is your personal guarantee that the machine cannot be re-energized while you are on or inside it. Sharing locks, using combination locks, or relying on a tag alone when a lock can be used are violations that have cost workers their lives.

• Personal keyed padlock — one worker, one key, one lock. The only person who can remove that lock is the person who placed it
• Padlocks must be individually keyed — no duplicate keys held by supervisors or anyone else without the worker's explicit knowledge
• Multiple hasps for multi-worker lockout: a multi-hasp device allows each worker to apply their own lock — all locks must be removed before the equipment can be re-energized
• Color-coding by trade is encouraged: electricians use red, plumbers use blue, etc. — but color-coding does not replace personal locks

• Tagout may be used only when the equipment cannot be physically locked out (no hasp or lockable isolating mechanism)
• A tag is a warning device — it does NOT prevent someone from energizing the equipment. Tagout provides less protection than lockout
• Additional protective measures required with tagout: blocking, removing a valve handle, opening a disconnect and tying it open
• Tags must state: "Do Not Operate — Work in Progress" with the worker's name, department, and date/time applied